Pulley.



J. T. MORRISON.

PULLEY.

APPLIOATIMI FILED MAR. 11, 1909.

964,67& Patent ed July 19,1910.

JGSEPI-I T. MORRISON, OF HARTFORD, CONNECTICUT, ASSIGNOR OF ONE-HALF TOCHARLES J. STAFFORD, OF HARTFORD, CONNECTICUT.

PULLEY.

To all whom it may concern:

Be it known that I, Josnri-i T. MORRISON, a citizen of the UnitedStates, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPulleys; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appcrtains to make and use the same.

This invention relates to improvements in pulleys.

The object of the invention is toprovide an improved construction ofpulley having its frame formed of metal plates which are pressed attheir lower ends into the required shape to form a ball race to receivebearing balls on which the pulley wheel is revolubly mounted.

A further object is to provide a pulley having its frame constructed topermit the passage of knots which may be in the cable or rope engagedwith the pulley.

IVith the foregoing and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts as will be more fully described and particularly pointed out inthe appended claim.

In the accompanying drawings, Figure 1 is side view of a pulleyconstructed in accordance with the invention; Fig. 2 is a vertical crosssectional view taken through the center of the same; Figs. 3 and 4 are,respectively, side and edge views of one of the side plates of theframe.

Referring more particularly to the drawings, 1 denotes the pulley framewhich consists of two metal plates which are bent into suitable shapesand secured together to form the sides of the frame, as shown. Theplates each consists of an oblong strip 2 forming the body portion ofthe frame said strip having formed at its lower end a circular bearingportion 3, said port-ion being pressed or bent inwardly at its center toform a bearing cone or ball race 4. In the center of the portion 3 isformed an aperture to receive the end of the pulley shaft 5.

The upper end of the strip 2 forming the body portion of the side plateis reduced to form a neck 6 and on the upper end of Specification ofLetters Patent.

Application filed March 11, 1909.

Patented July 19, 1910.

Serial No. 482,705.

said neck is formed an eye 7. The upper end of the strip 2 immediatelybelow the neck portion 6 is bent outwardly and then inwardly to form aloop 8, the purpose of which will hereinafter appear.

In assembling the parts to form the frame of the pulley the side platesare brought together until the neck portions 6 thereof are engaged, saidneck portions are then twisted together to bring the eye members 7 atright angles to the edge of the plates, as shown in Fig. 2 of thedrawings. Then the plates have been thus brought together, the pulley 9is arranged between the body portions of the side plates 2, and throughthe bearing eye 10 of the pulley and the alined apertures formed in thebearing portions 3 of the side plates is inserted the bearing shaft orpin 5 of the pulley.

The pulley 9 consists of an outer rim portion having in its outer edgean annular groove 12 to receive the rope or cable engaged therewith. Thecenter of the pulley is countersunk on each side to form ball races 13which coact with the ball races t formed in the bearing portion 3 of theside plates to retain series of bearing balls 14- which are arranged oneach side of the pulley, as shown. By means of the ball races andbearing balls, the pulley 9 has an anti-frictional engagement with theside plates of the frame and will freely revolve between said plates.

When the side plates have been brought together in the mannerhereinbefore described, the looped portions 8 of the same will form anelongated passage immediately above the pulley wheel, said passagepermitting knots or obstructions on the cable or rope to readily passthrough the frame.

A pulley constructed as herein shown and described will be simple,strong and durable in construction, eflicient and reliable in operationand may be inexpensively manufactured.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as defined in theappended claim.

Having thus described my invention, what I claim is:

A pulley support comprising a pair of fiat side plates provided at theirlower ends with enlarged bearing portions pressed inwardly at theircenters to form a cone or ball race, U-shaped loops formed by bendingportions of the plates inwardly, reduced necks at the outer ends of saidloops and enlarged eyed portions formed at the upper ends of the necksthe eyed portions fitting against each other and the neck portions ofthe plates twisted to dispose the eyed portions at right angles to theside plates.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH T. MORRISON. [L.S.]

Witnesses:

Enos H. LANE, HENRY U. S'roRRs.

